BURKERT 20114550 (Type 8652 AirLINE) is a 24-slot pneumatic valve island configured with an anodised aluminium AirLINE Quick adapter plate, an intermediate pneumatic supply module, and 24 dual 3/2-way normally closed (CF-C) Type 6534 pilot valves. The assembly provides 48 discrete pneumatic control channels in a compact 11 mm station pitch, designed specifically for process automation environments where space optimisation and process reliability are mandatory.

Communication is handled by a high-performance Industrial Ethernet fieldbus module featuring dual RJ45 ports (X1 and X2). The module natively supports PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic. Process security is enhanced through integrated check valves in the common exhaust air ducts (ports 3 and 5), preventing unwanted actuator movement caused by backpressure spikes, while pneumatic HotSwap functionality in the P-channel (port 1) allows replacement of pilot valves during active operation without system depressurisation.

Key Features and Equipment Scope

• 24 Valve Slots / 48 Valve Functions: Fully populated with 24 individual Type 6534 slices, each containing two independent 3/2-way servo-controlled valves (Circuit Function C, normally closed).
• AirLINE Quick Aluminium Interface: Base-plate design adapted for direct through-wall or bottom-of-cabinet mounting, sealing the control cabinet to IP65 while presenting all pneumatic connections externally.
• Integrated Pneumatic Intermediate Feed: Factory-equipped with one central supply and exhaust module to ensure balanced air delivery and exhaust throughput across all 24 stations.
• Pneumatic HotSwap in Port 1 (P): Integrated non-return check element enables valve replacement under full operating pressure with an air throughput reduction of only ~3%.
• Integrated Check Valves in Ports 3 (R) and 5 (S): Protects process valves from unplanned actuation caused by exhaust line pressure peaks.
• Industrial Ethernet Multiprotocol Module: Dual RJ45 interface supporting PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic.
• Low Power Consumption: 0.7 W initial pick-up power per valve, reducing automatically to 0.175 W hold power via electronic current limiting (29 mA to 10 mA at 24 V DC).

Technical Data

Technical Parameter	Specification / Rating
Product Type	Type 8652 AirLINE Valve Island
Article Number (Ident No.)	20114550
Number of Valve Slots	24 slots (11 mm station width)
Populated Valve Type	Type 6534 dual 3/2-way CF-C (normally closed)
Total Controlled Functions	48 pneumatic outputs
Operating Pressure Range	-1.00 bar to 10.00 bar (vacuum to 10 bar)
Auxiliary Pilot Air Pressure	3.00 bar to 10.00 bar (internal supply)
Nominal Air Flow Rate ($Q_{\text{Nn}}$)	310 l/min (air at +20 °C, 6 bar inlet, 1 bar $\Delta p$); 270 l/min for CF-C
HotSwap Air Flow Impact	Flow rate reduced by approximately 3%
Operating Voltage	24 V DC (±10%), residual ripple 1 Vss
Valve Coil Power	0.7 W (0.175 W after electronic power reduction)
Valve Coil Current	29 mA (10 mA after electronic power reduction)
Duty Cycle	100% ED (continuous operation)
Switching Time	Opening: 15 ms, Closing: 15 ms (ISO 12238)
Operating Medium	Lubricated or dry compressed air, neutral gases (ISO 8573-1:2010 Class 7.4.4, 5 µm filter)
Body / Seal Material	Polyamide (PA) / NBR and PUR seals
AirLINE Quick Plate Material	Anodised aluminium (adapter plate)
Pneumatic Port Sizes	Supply (1): D10 mm brass; Working ports (2, 4): D6 mm brass
Additional Supplies	Left, right, and center intermediate feed: D6 and D10 push-in fittings
Degree of Protection	IP20 standalone; IP65 inside closed cabinet with AirLINE Quick plate
Ambient / Medium Temperature	-10 °C to +55 °C
Storage Temperature	-20 °C to +60 °C
Total Current & Overvoltage	Electrical safety Class III (DIN EN 61140, VDE 0140)

AirLINE Quick Interface and Installation

The AirLINE Quick adapter plate drastically reduces the footprint and assembly time inside the control cabinet. Instead of routing 48 flexible tubing lines through separate cabinet cable glands or bulkheads, the valve island mounts directly into a cutout in the cabinet floor or side wall.

All working lines (D6 push-in connections) and main supply lines (D10 push-in connections) emerge directly outside the enclosure. The anodised aluminium adapter plate provides a robust mechanical seal, preserving an ingress protection rating of IP65 for the electrical and pneumatic components enclosed within the cabinet.

Installation Clearance for HotSwap

When installing the valve island inside the control cabinet, adhere to the minimum spacing from the cabinet front edge and walls to enable smooth valve removal and insertion under pressure.

Dimensional Data (24-Slot Configuration)

The Type 8652 with 24 valve slots and an integrated intermediate feed module features extended length dimensions compared to basic 4-, 8-, and 12-slot variants.

Configuration Variant	A (mm)	B (mm)	C (Fastening)	D (mm)	m	m'	n
16-fold with intermediate supply	112	224	10× M5	114.3	7	7	4
20-fold with intermediate supply	134	268	10× M5	158.3	11	7	5
24-fold with intermediate supply (20114550)	156	312	10× M5	158.3	11	11	6
16-fold without intermediate supply	99	198	10× M5	—	15	—	4
20-fold without intermediate supply	121	242	10× M5	—	19	—	5
24-fold without intermediate supply	143	286	10× M5	—	23	—	6

Electrical Connections and Fieldbus Pinout

The valve island utilizes separate electrical supplies for communication electronics and pneumatic valve coils, isolating digital processing from inductive switching disturbances.

1. Communication and Electronics Supply (5-Pin Spring-Loaded Terminal)

Terminal	Wire Colour	Signal Assignment	Conductor Cross-Section
1	Red	+24 V DC (Communication)	$\le 1.5\text{ mm}^2$
2	White	CAN_H (büS connection)	$\le 1.5\text{ mm}^2$
3	Green	SHIELDING	$\le 1.5\text{ mm}^2$
4	Blue	CAN_L (büS connection)	$\le 1.5\text{ mm}^2$
5	Black	0 V DC (GND)	$\le 1.5\text{ mm}^2$

2. Valve Actuation Power Supply (2-Pin Spring-Loaded Terminal)

Pin	Wire Colour	Signal Assignment	Conductor Cross-Section
1	Red	AUX +24 V DC (Pneumatic Valves)	$\le 1.5\text{ mm}^2$
2	Black	0 V DC (GND)	$\le 1.5\text{ mm}^2$

3. Industrial Ethernet RJ45 Pin Assignment (Ports X1 and X2)

Pin	Signal	Pin	Signal
1	TX+ (Transmit Data +)	5	N.C. (Not connected)
2	TX- (Transmit Data -)	6	RX- (Receive Data -)
3	RX+ (Receive Data +)	7	N.C. (Not connected)
4	N.C. (Not connected)	8	N.C. (Not connected)

Circuit Functions and Replacement Pilot Valves

Article 20114550 comes factory-fitted with 24 units of Type 6534 in Circuit Function C ($2\times 3/2$-way normally closed). When maintenance or line retooling is required, genuine Burkert Type 6534 pilot valves and blanking plates can be ordered using the following reference identifiers.

Circuit Function	Nominal Diameter	$Q_{\text{Nn}}$ Air	Pressure Range	Response Time Open / Close	Coil Voltage	Valve Article No. (incl. screws)	Spare Part Set REF
C: $2\times 3/2$-way NC (Installed on 20114550)	4 mm	270 l/min	Vac...10 bar	15 ms / 15 ms	24 V DC	301374	296031
C: single 3/2-way NC	4 mm	270 l/min	Vac...10 bar	15 ms / 15 ms	24 V DC	20102334	20088974
D: $2\times 3/2$-way NO	4 mm	310 l/min	Vac...10 bar	15 ms / 15 ms	24 V DC	301375	296032
H: 5/2-way monostable	4 mm	290 l/min	Vac...10 bar	20 ms / 25 ms	24 V DC	301376	296033
Z: 5/2-way bistable (impulse)	4 mm	290 l/min	Vac...10 bar	20 ms / 25 ms	24 V DC	301377	296034
L: 5/3-way closed center	4 mm	275 l/min	Vac...10 bar	15 ms / 15 ms	24 V DC	301380	296036
M: 5/3-way pressurized center	4 mm	300 l/min	Vac...10 bar	20 ms / 20 ms	24 V DC	301379	296035
N: 5/3-way exhausted center	4 mm	300 l/min	Vac...10 bar	20 ms / 20 ms	24 V DC	301381	296039
Dummy blanking plate	—	—	—	—	—	335779	327614

Auxiliary Pilot Air Requirements

For vacuum or working pressures below 3 bar, separate auxiliary pilot pressure of 3 bar to 10 bar must be applied. In model 20114550, auxiliary pilot air is routed internally from the main feed.

Hazardous Area Approvals and Special Conditions

Type 8652 valve islands with explosion-protection classification comply with European ATEX Directive 2014/34/EU, IECEx, CCC, and North American NEC standards for Zone 2 and Zone 22 applications.

• ATEX Certificate: BVS 20 ATEX E 031 U (II 3G Ex ec IIC Gc, II 3D Ex tc IIIC Dc)
• IECEx Certificate: IECEx BVS 20.0024 U (Ex ec IIC Gc, Ex tc IIIC Dc)
• North America (cURus HazLoc): Class I, Zone 2, AEx ec IIC Gc / Class II, Zone 22, AEx tc IIIC Dc; Class I, Div 2, Groups A, B, C, D / Class II, III, Div 2, Groups F, G
• China Compulsory Certification: CCC explosion-proof certified for hazardous environments
• Temperature Class: T4 at an internal control cabinet temperature up to +55 °C

Special Conditions for Safe Use in Hazardous Locations

1. Enclosure Rating: The valve island must be installed inside an enclosure providing at least IP54 protection for gas atmospheres (3G / Ex ec) or IP6X for combustible dust atmospheres (3D / Ex tc).
2. De-Energised Connection: In a potentially explosive atmosphere, the 24 V power supply, fieldbus cables, and terminal blocks must only be plugged or unplugged when fully de-energised.
3. HotSwap Restriction: Pneumatic HotSwap must not be performed while an explosive atmosphere is present unless the area is confirmed to be non-hazardous by calibrated testing instruments.
4. Transient Protection: External overvoltage protection must prevent supply voltage transients from exceeding 140% of the nominal peak voltage.